Section 40(a)(ia) 2nd Proviso Inserted by Finance Act wef AY 2013-14 abating TDS disallowance on production of CA certificate attesting payment of tax and filing of return by deductee which was held applicable with retrospective effect by Agra Bench in Rajiv Kumar Agarwal ITA PGB/2013 and confirmed by ITAT Delhi in Ansal Land Mark Township P Ltd also upheld by Delhi High court in ITA 161/2015 dated 26-08-2015. High Court praised ITAT for thorough analysis on the subject